CN1298197C - Power factor correcting unit with electronic ballast function - Google Patents
Power factor correcting unit with electronic ballast function Download PDFInfo
- Publication number
- CN1298197C CN1298197C CNB011331216A CN01133121A CN1298197C CN 1298197 C CN1298197 C CN 1298197C CN B011331216 A CNB011331216 A CN B011331216A CN 01133121 A CN01133121 A CN 01133121A CN 1298197 C CN1298197 C CN 1298197C
- Authority
- CN
- China
- Prior art keywords
- voltage
- fluorescent tube
- power factor
- resistor
- order
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention provides a power factor corrector having the functions of an electronic ballast. In a power factor correction circuit, a control circuit having the functions of an electronic ballast is added so as to save electricity and space and achieve stable system reliability for the power factor corrector. The power factor corrector having the functions of an electronic ballast mainly comprises a lamp tube for supplying illumination, a lamp ignitor, a voltage/current controller and a power factor correction circuit, wherein the lamp ignitor is connected with the lamp tube in series so that the lamp tube begins to illuminate; the voltage/current controller is connected in parallel with both ends of the lamp tube connected in series and the lamp ignitor so as to receive the voltage at both ends of the lamp tube and send out a feedback signal according to the received voltage at both ends of the lamp tube; the power factor correction circuit is connected with the voltage/current controller in parallel for adjusting output power supply according to the feedback signal so as to protect the circuit and enhance the system reliability.
Description
Technical field
The present invention relates to a kind of power factor correcting (power factor correction device, PFC), especially, relate to a kind of power factor correcting with electronic ballast function, it increases in a circuit of power factor correction, and a control circuit that can produce electronic ballast function reduces Harmonic Interference to reach, economizes power, the purpose of save space and stable system reliability.
Background technology
The power factor of ballast is the effective power percentage that expression one input current really applies to ballast.Have higher light output owing to drive the electric ballast of lamp luminescence with high-frequency mode,, therefore replaced traditional ballast and starter and be widely used, for example, be used on all kinds of projectors just than power saving.Traditionally, the design of the fluorescent tube lamp circuit of a projector normally separates power factor correction converter and electric ballast (Ballast), as shown in Figure 1.Fig. 2 is a traditional projector fluorescent tube lighting system line map.This system comprises a rectifier 21, a circuit of power factor correction 22, an energy storage capacitor C3, a circuit of electronic ballast 24, an apparatus for lighting up 25 and a fluorescent tube LAMP in Fig. 2.As shown in Figure 2, this rectifier 21 is full bridge rectifier, and it is made up of diode BD1-BD4, and a voltage regulation capacitor Cl, in order to provide this system's alternating current to galvanic conversion, for example, 110VAC is changed into 150VDC or 220VAC is changed into 300VDC.Mainly comprise this circuit of power factor correction 22 a transformer T1, input power detect resistor R 1-R3, an electric capacity of voltage regulation C2, one and stop diode D1, a mos field effect transistor switch (MOSFET switch) Q1 and a controller CTRL1.This input power of being coupled to the output of this rectifier 21 detects the end of the first inductance TL1 among an end of resistor R 1 and this transformer T1.The other end of this resistor R 1 is coupled to an end of resistor R 2.The other end of this first inductance TL1 is coupled to a source terminal and the forward biased diode D2 of this switch Q1.These resistor R 2 other ends are coupled to the negative end (node A) of input, this ground connection electric capacity of voltage regulation C2 and this diode D1 of this controller CTRL1.The forward end of this diode (Node B) is coupled to an end of this resistor R 3 and the second inductance TL2, one end among this transformer T1, and the other end of this second inductance TL2 is ground connection then, and the other end of this resistor R 3 is coupled to the input of this controller CTRL1.The output of this controller CTRL1 is coupled to the grid of this switch Q1 through a resistor R 4.The drain electrode of this switch Q1 is coupled to an input and the grounding resistor R5 of this controller CTRL1.Under this structure, this circuit 22 utilizes this controller CTRL1 to receive the output and the feedback signal FB from this switch Q1 drain electrode of the transformer two inductance ends that detected from resistor R 1-R3 respectively.This feedback signal FB is in order to revising the output voltage of these transformer two inductance ends, optionally changes work period (ON duty ratio) of switch Q1 and/or its frequency by this so that correct power factor output to be provided.Wherein, the electric charge adverse current of using this obstruction diode D1 to stop to be stored among the capacitor C2 so that influence the detected value of this detection resistor R 3, and then make controller CTRL1 can't export correct power factor.Similarly, diode D2 has identical functions with respect to the ground capacity C3 that stores from this circuit of power factor correction 22 direct currents output.Because loading condition can have influence on output phase coherence (the output phase coherence of electric current and voltage, for example, if projector is output voltage and the electric current same-phase only when using incandescent lamp tube, and this moment, output power factor was 100%, yet, actual load is comparatively complicated, at this moment, can use capacitor (C3) to come storage of electrical energy earlier, therefore, just need an electric ballast to come the holding power factor to be output in a stable state, for example, surpass 0.95.This ballast circuit 24 promptly is as electric ballast.Traditionally, as shown in Figure 2, this circuit 24 comprises a switch mosfet Q2, a LC antiresonant circuit, an obstruction diode D3 and a controller CTRL2.The source electrode of this switch Q2 connects this capacitor C 3 unearthed ends, and its grid then receives an input signal through resistor R 6 from this controller, and its drain electrode then is connected to the end of the inductor L1 of the negative electricity end of this obstruction diode D3 and this LC parallel circuits simultaneously.This inductor L1 is connected to the end of outer tube LAMP and the ground capacity C4 of this LC parallel circuits simultaneously.The positive terminal of this diode is ground connection and be connected to an end of a resistor R 7 simultaneously.The other end of this resistor R 7 then is connected to this controller CTRL2 to produce a feedback signal BFB.Simultaneously, these resistor R 7 other ends are connected to an end of this apparatus for lighting up 25, its comprise one in order to the igniting transformer T2 and in order to control the controller CTRL3 of this transformer T2, the other end of this apparatus for lighting up 25 connects the other end of this fluorescent tube LAMP.This controller utilizes this feedback signal BFB to export the output frequency that a control signal is adjusted this switch Q2, makes that by this having direct current is regulated and control the power output of LC this fluorescent tube that resonant circuit exports to of interchange translation function.This diode D3 can prevent that as aforesaid diode D1 the drain electrode end electric current of this switch Q2 and voltage adverse current from having influence on this feedback signal, and then influence is supplied to the alternating current of this fluorescent tube LAMP and stability (optical flare index) when causing this lamp luminescence (projection).For example, institute causes the projection generation jitter phenomenon of transparency when the optical flare index of fluorescent tube surpasses 0.01.Traditionally, aforementioned power factor correcting circuit 22 can be depressurized to about about 85VDC so that fluorescent tube LAMP to be provided required voltage at the LC resonant circuit that utilizes this ballast circuit 24 with rectifier 21 output voltage voltage stabilizings near about 380VDC.But the circuit of aforementioned this class formation is quite complicated, so that has power consumption, takes up space, takes shortcoming such as cost.
Summary of the invention
Therefore, a purpose of the present invention is for providing a kind of power factor correcting with electronic ballast function, and it increases by one in a circuit of power factor correction can produce the control circuit of electronic ballast function so that the power saving of this device, save space and stable system reliability to be provided.
The invention provides a kind of power factor correcting with electronic ballast function, it increases by one in a circuit of power factor correction can produce the control circuit of electronic ballast function so that the power saving of this device, save space and stable system reliability to be provided.This circuit of power factor correction with electronic ballast function comprises: a fluorescent tube, in order to illumination to be provided; One apparatus for lighting up is connected in series this fluorescent tube to start the illumination of this fluorescent tube; One storage capacitance is in order to provide this lamp luminescence required magnitude of voltage; A plurality of detection resistors are in order to measure the magnitude of voltage of this lamp tube ends; One voltage/current controller is parallel to the two ends of the fluorescent tube and the apparatus for lighting up of described serial connection, in order to receive this lamp tube ends voltage and to send a feedback signal according to the lamp tube ends voltage that is received; One circuit of power factor correction is parallel to this voltage/current controller, in order to according to the power supply of this feedback signal adjustment output reliability with protective circuit and elevator system.
Description of drawings
For make described and other purpose of the present invention, feature, can be more apparent with advantage, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Fig. 1 shows the fluorescent tube lamp circuit block schematic diagram of a traditional projector;
Fig. 2 shows the part fluorescent tube lamp circuit figure according to Fig. 1;
Fig. 3 is the circuit of power factor correction that the present invention one has electronic ballast function; And
Fig. 4 is the functional block diagram of Fig. 3.
Embodiment
Same numeral is in full represented similar elements.
With reference to Fig. 3, be the circuit of power factor correction that the present invention one has electronic ballast function.In Fig. 3, ballast circuit among Fig. 2 is redesigned, when making it to be connected with former circuit of power factor correction 22, apparatus for lighting up 25 and fluorescent tube LAMP, can have the function of primary electron ballast but do not need the original complicated circuit of primary electron ballast, thereby produce the circuit of power factor correction that this has electronic ballast function.As shown in Figure 3, except that intrinsic be used for alternating current (AC) convert to direct current (DC) rectifier 21, be used to adjust power factor circuit of power factor correction 22, be used to light the apparatus for lighting up 25 of fluorescent tube and the fluorescent tube LAMP that is used to throw light on, also comprise a voltage/current control circuit 31.Because except that this control circuit 31, all the other each circuit all are same as Fig. 2, so in this no longer repeat specification, do not explain and only just do not exist together with Fig. 2.In this voltage and current controller 31, comprise a storage capacitance Ce, in order to measure detection resistor R 36, R37, R38 and R39, an external control switch SN and a controller CTRL4 of lamp tube ends voltage difference.As shown in Figure 3, this storage capacitance two ends Cvcc and Bvcc are output and circuit of power factor correction (PFC circuit) the former output of cross-over connection in rectifier 21.Note, this is to be different from traditional connected mode, the present invention is that the output of the device of self-rectifying in the future 21 is coupled in the negative voltage side of capacitor Ce and will be coupled in the positive voltage terminal of capacitor Ce from the output of pfc circuit 22, but, traditionally, be the negative voltage side that directly output of pfc circuit 22 is connected storage capacitance C3, the positive voltage terminal of capacitor C 3 is ground connection then.Be coupled to an end and the apparatus for lighting up 25 that detects resistance R 36 via node Cvcc.The other end that detects resistance R 36 is coupled to an end of detection resistance R 37 and an input of the differential amplifier (not shown) in this controller CTRL4.The other end that detects resistance R 37 is coupled to an end of resistance R 39 and the feedback signal of pfc circuit.Resistance R 39 is connected to an end of resistance R 38 and another input of the differential amplifier in the controller CTRL4.The other end of resistance R 38 couples the end of Node B vcc and this external control switch SN.The other end of this external control switch SN couples the positive voltage terminal of fluorescent tube.
Under said structure, because of the resistance R of fluorescent tube can be fixed for making power output because of changing with the time of using, must be according to the variation adjustment supply voltage V and the electric current I thereon of resistance R, so that the power consumption of its fluorescent tube is for fixing.In view of the above, controller CTRL4 utilizes resistor R 36-R39 that the voltage of lamp tube ends is inputed to inner differential amplifier respectively to obtain the present magnitude of voltage of fluorescent tube, again this magnitude of voltage is fed back to controller CTRL1 to adjust the charge value of exporting and being stored among this storage capacitance Ce, the voltage range of its adjustment is between 20 to 90VDC, keep one by this and stablize power output and keep the constant of lighting tube brightness, thereby avoid the generation of optical flare phenomenon.The selection of an external control circuit to provide abnormal type to light a lamp is provided this external control switch SN.This switch S N can be a relay, a metal-oxide semiconductor (MOS) (MOS) element or a thyristor element (thyristor).
Fig. 4 is the functional block diagram of Fig. 3.As shown in Figure 4, utilize a rectifier to convert the alternating voltage of input to circuit operation required direct voltage 150/300VDC by 110/220VAC earlier, utilize voltage in the power factor correcting device of the present invention and current control circuit to produce the output voltage that a feedback control signal FBC comes power controlling factor correcting circuit directly to produce about about 85VDC again and be supplied to the fluorescent tube use.So, can save the required reduction voltage circuit of ballast circuit, and then reduce cost, save the space and reduce power loss.If this fluorescent tube is an interchange fluorescent tube, then need increase transducer (DC/AC) (not shown) of a direct current, in order to this interchange fluorescent tube one alternating voltage to be provided to alternating current.This transducer can utilize any known direct current to reach exchanging switch technology, for example, and full-bridge type or half bridge circuit.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any technical staff who knows this technology; in without departing from the spirit or scope of the invention; change and retouching when doing, so protection scope of the present invention should be with being as the criterion that the claim scope is defined.
Claims (11)
1. power factor correcting with electronic ballast function comprises:
One fluorescent tube is in order to provide illumination;
One apparatus for lighting up is connected in series this fluorescent tube, to start this fluorescent tube illumination;
One rectifier is in order to provide a dc operation voltage;
One storage capacitance, this rectifier in parallel, this storage capacitance one end is connected in series this apparatus for lighting up, and this storage capacitance is in order to provide this lamp luminescence required magnitude of voltage;
A plurality of detection resistors, this fluorescent tube in parallel is in order to measure the magnitude of voltage of this lamp tube ends;
One voltage and current controller are connected in parallel on the two ends of the fluorescent tube and the apparatus for lighting up of described serial connection, in order to according to producing a feedback control signal at the measured magnitude of voltage of this lamp tube ends;
One power factor correction controller is parallel to this voltage/current controller, in order to adjust the magnitude of voltage in this storage capacitance according to this feedback control signal.
2. device as claimed in claim 1 further comprises an external control switch, in order to from this lamp luminescence of external control.
3. device as claimed in claim 1, wherein, this fluorescent tube is a direct current fluorescent tube.
4. device as claimed in claim 1, wherein, this fluorescent tube is an interchange fluorescent tube.
5. device as claimed in claim 1, wherein, this luminous required magnitude of voltage is that a scope drops on the voltage between 20 to 90V.
6. device as claimed in claim 6, wherein, this fluorescent tube is a direct current fluorescent tube.
7. the device of stating as claim 1, wherein, this fluorescent tube is one to exchange fluorescent tube.
8. device as claimed in claim 1 wherein, for this interchange fluorescent tube one alternating voltage is provided, comprises that further a direct current is to a-c transducer.
9. device as claimed in claim 8, wherein, this direct current is a full bridge circuit to a-c transducer.
10. device as claimed in claim 8, wherein, this direct current is a half bridge circuit to a-c transducer.
11. device as claimed in claim 8, wherein, this circuit of power factor correction further comprises:
One transformer comprises one first inductance and a ground connection second inductance, and wherein, this first inductance, one end connects the negative electricity end of this storage capacitance;
One first input power detects resistor, comprise that one first resistance and one second resistance string are connected together, wherein, this first input power detection resistor, one end is connected to the same end and its interface point that are connected with this storage capacitance in this first inductance and is connected to this rectifier output end;
One ground capacity is connected to the other end of this first input power resistor;
One stops diode, and it is coupled between the interface point of this ground connection second inductance and this ground connection electric capacity of voltage regulation and this first input power resistor;
One second input power detects resistor, and the one end is connected to the interface point between this obstruction diode and this ground connection second inductance;
One mos field effect transistor switch, comprise one source pole, a drain electrode and a grid, wherein, this source electrode is connected to this first inductance other end and simultaneously in order to being connected to the forward diode of output, and this drain electrode is connected to an earth resistance that is used to detect feedback voltage; And
One controller, its output are connected to the grid of this mos field effect transistor switch by a resistor in order to voltage stabilizing and its input is connected to the interface point that the interface point of output, this mos field effect transistor switch and this earth resistance of this voltage and current controller, the other end that this second input power detects resistor and this first input power detect resistor, this obstruction diode and this ground capacity three simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011331216A CN1298197C (en) | 2001-09-14 | 2001-09-14 | Power factor correcting unit with electronic ballast function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011331216A CN1298197C (en) | 2001-09-14 | 2001-09-14 | Power factor correcting unit with electronic ballast function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1406103A CN1406103A (en) | 2003-03-26 |
| CN1298197C true CN1298197C (en) | 2007-01-31 |
Family
ID=4671619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011331216A Expired - Fee Related CN1298197C (en) | 2001-09-14 | 2001-09-14 | Power factor correcting unit with electronic ballast function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1298197C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144962B (en) * | 2006-09-12 | 2011-07-27 | 佳世达科技股份有限公司 | Electronic device and its power factor improvement return circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189083A (en) * | 1997-01-19 | 1998-07-29 | 王肖峰 | Gas discharge lamp electronic ballast |
| CN2346141Y (en) * | 1998-07-24 | 1999-10-27 | 殷先洪 | High-performance high-tension sodium lamp electronic ballast |
| CN1290120A (en) * | 2000-10-08 | 2001-04-04 | 邓树兴 | Reactive power factor correcting network |
-
2001
- 2001-09-14 CN CNB011331216A patent/CN1298197C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189083A (en) * | 1997-01-19 | 1998-07-29 | 王肖峰 | Gas discharge lamp electronic ballast |
| CN2346141Y (en) * | 1998-07-24 | 1999-10-27 | 殷先洪 | High-performance high-tension sodium lamp electronic ballast |
| CN1290120A (en) * | 2000-10-08 | 2001-04-04 | 邓树兴 | Reactive power factor correcting network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1406103A (en) | 2003-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1096823C (en) | Discharge lamp ballast | |
| US8035318B2 (en) | Apparatus and method enabling fully dimmable operation of a compact fluorescent lamp | |
| US6696803B2 (en) | Self-oscillating electronic discharge lamp ballast with dimming control | |
| US4870327A (en) | High frequency, electronic fluorescent lamp ballast | |
| JP2004514250A (en) | Voltage regulated electronic ballast for multiple discharge lamps | |
| CN110495253B (en) | Power converter circuit | |
| EP2524579A2 (en) | A power factor correction circuit of an electronic ballast | |
| US8358078B2 (en) | Fluorescent lamp dimmer with multi-function integrated circuit | |
| JP5300501B2 (en) | Lighting device and lighting apparatus | |
| CN1298197C (en) | Power factor correcting unit with electronic ballast function | |
| CN212115738U (en) | Non-stroboscopic dimming driver utilizing input valley bottom compensation | |
| CN211090042U (en) | L ED silicon controlled rectifier light-adjusting power supply | |
| JP3918109B2 (en) | Discharge lamp lighting device | |
| CN111511079A (en) | Non-stroboscopic dimming driver utilizing input valley bottom compensation | |
| US6703794B2 (en) | Power factor correction device including electronic ballast function | |
| CN103260292A (en) | Drive circuit for load and luminous device comprising the drive circuit | |
| RU2007128966A (en) | METHOD FOR CONTROLING A CATHODE VOLTAGE OF A DISCHARGE LAMP WITH A LOW DISCHARGE CURRENT | |
| US6104142A (en) | Circuit arrangement for operating low-pressure discharge lamps | |
| CN211128315U (en) | L ED driving power supply capable of configuring constant lumens | |
| KR102490634B1 (en) | A Converter Circuit for LED Lamps Having Power Factor Correction Function with Dimming and Overheat-Preventng Function | |
| CN203301830U (en) | Low voltage halogen lamp electronic transformer | |
| CN201450656U (en) | Circuit of cold cathode fluorescent energy-saving lamp | |
| CN211509380U (en) | Silicon controlled rectifier dimming color-changing circuit | |
| KR101905305B1 (en) | An Apparatus For Lighting Cold Cathode Fluorescent Lamps | |
| Díaz Rodríguez et al. | Power source electronic ballast for electrodeless fluorescent lamps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070131 Termination date: 20100914 |